| 1 |
<?php |
| 2 |
/** |
| 3 |
* Bootstraps Global Styles. |
| 4 |
* |
| 5 |
* @package gutenberg |
| 6 |
*/ |
| 7 |
|
| 8 |
/** |
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* Whether the current theme has a theme.json file. |
| 10 |
* |
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* @return boolean |
| 12 |
*/ |
| 13 |
function gutenberg_experimental_global_styles_has_theme_json_support() { |
| 14 |
return is_readable( locate_template( 'experimental-theme.json' ) ); |
| 15 |
} |
| 16 |
|
| 17 |
/** |
| 18 |
* Given a tree, it creates a flattened one |
| 19 |
* by merging the keys and binding the leaf values |
| 20 |
* to the new keys. |
| 21 |
* |
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* This is thought to be useful to generate |
| 23 |
* CSS Custom Properties from a tree, |
| 24 |
* although there's nothing in the implementation |
| 25 |
* of this function that requires that format. |
| 26 |
* |
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* For example, assuming the given prefix is '--wp' |
| 28 |
* and the token is '--', for this input tree: |
| 29 |
* |
| 30 |
* { |
| 31 |
* 'property': 'value', |
| 32 |
* 'nested-property': { |
| 33 |
* 'sub-property': 'value' |
| 34 |
* } |
| 35 |
* } |
| 36 |
* |
| 37 |
* it'll return this output: |
| 38 |
* |
| 39 |
* { |
| 40 |
* '--wp--property': 'value', |
| 41 |
* '--wp--nested-property--sub-property': 'value' |
| 42 |
* } |
| 43 |
* |
| 44 |
* @param array $tree Input tree to process. |
| 45 |
* @param string $prefix Prefix to prepend to each variable. '' by default. |
| 46 |
* @param string $token Token to use between levels. '--' by default. |
| 47 |
* |
| 48 |
* @return array The flattened tree. |
| 49 |
*/ |
| 50 |
function gutenberg_experimental_global_styles_get_css_vars( $tree, $prefix = '', $token = '--' ) { |
| 51 |
$result = array(); |
| 52 |
foreach ( $tree as $property => $value ) { |
| 53 |
$new_key = $prefix . str_replace( '/', '-', $property ); |
| 54 |
|
| 55 |
if ( is_array( $value ) ) { |
| 56 |
$new_prefix = $new_key . $token; |
| 57 |
$result = array_merge( |
| 58 |
$result, |
| 59 |
gutenberg_experimental_global_styles_get_css_vars( $value, $new_prefix, $token ) |
| 60 |
); |
| 61 |
} else { |
| 62 |
$result[ $new_key ] = $value; |
| 63 |
} |
| 64 |
} |
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return $result; |
| 66 |
} |
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|
| 68 |
/** |
| 69 |
* Processes a file that adheres to the theme.json |
| 70 |
* schema and returns an array with its contents, |
| 71 |
* or a void array if none found. |
| 72 |
* |
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* @param string $file_path Path to file. |
| 74 |
* @return array Contents that adhere to the theme.json schema. |
| 75 |
*/ |
| 76 |
function gutenberg_experimental_global_styles_get_from_file( $file_path ) { |
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$config = array(); |
| 78 |
if ( file_exists( $file_path ) ) { |
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$decoded_file = json_decode( |
| 80 |
file_get_contents( $file_path ), |
| 81 |
true |
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); |
| 83 |
if ( is_array( $decoded_file ) ) { |
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$config = $decoded_file; |
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} |
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} |
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return $config; |
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} |
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|
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/** |
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* Returns the user's origin config. |
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* |
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* @return array Config that adheres to the theme.json schema. |
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*/ |
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function gutenberg_experimental_global_styles_get_user() { |
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$config = array(); |
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$user_cpt = gutenberg_experimental_global_styles_get_user_cpt( array( 'publish' ) ); |
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if ( array_key_exists( 'post_content', $user_cpt ) ) { |
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$decoded_data = json_decode( $user_cpt['post_content'], true ); |
| 100 |
if ( is_array( $decoded_data ) ) { |
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$config = $decoded_data; |
| 102 |
} |
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} |
| 104 |
|
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return $config; |
| 106 |
} |
| 107 |
|
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/** |
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* Returns the CPT that contains the user's origin config |
| 110 |
* for the current theme or a void array if none found. |
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* |
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* It can also create and return a new draft CPT. |
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* |
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* @param array $post_status_filter Filter CPT by post status. |
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* ['publish'] by default, so it only fetches published posts. |
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* @param bool $should_create_draft Whether a new draft should be created if no CPT was found. |
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* False by default. |
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* @return array Custom Post Type for the user's origin config. |
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*/ |
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function gutenberg_experimental_global_styles_get_user_cpt( $post_status_filter = array( 'publish' ), $should_create_draft = false ) { |
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$user_cpt = array(); |
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$post_type_filter = 'wp_global_styles'; |
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$post_name_filter = 'wp-global-styles-' . strtolower( wp_get_theme()->get( 'TextDomain' ) ); |
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$recent_posts = wp_get_recent_posts( |
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array( |
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'numberposts' => 1, |
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'orderby' => 'date', |
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'order' => 'desc', |
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'post_type' => $post_type_filter, |
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'post_status' => $post_status_filter, |
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'name' => $post_name_filter, |
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) |
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); |
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|
| 135 |
if ( is_array( $recent_posts ) && ( count( $recent_posts ) === 1 ) ) { |
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$user_cpt = $recent_posts[0]; |
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} elseif ( $should_create_draft ) { |
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$cpt_post_id = wp_insert_post( |
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array( |
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'post_content' => '{}', |
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'post_status' => 'draft', |
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'post_type' => $post_type_filter, |
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'post_name' => $post_name_filter, |
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), |
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true |
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); |
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$user_cpt = get_post( $cpt_post_id, ARRAY_A ); |
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} |
| 149 |
|
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return $user_cpt; |
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} |
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|
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/** |
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* Returns the post ID of the CPT containing the user's origin config. |
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* |
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* @return integer |
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*/ |
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function gutenberg_experimental_global_styles_get_user_cpt_id() { |
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$user_cpt_id = null; |
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$user_cpt = gutenberg_experimental_global_styles_get_user_cpt( array( 'publish', 'draft' ), true ); |
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if ( array_key_exists( 'ID', $user_cpt ) ) { |
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$user_cpt_id = $user_cpt['ID']; |
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} |
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return $user_cpt_id; |
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} |
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|
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/** |
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* Return core's origin config. |
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* |
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* @return array Config that adheres to the theme.json schema. |
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*/ |
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function gutenberg_experimental_global_styles_get_core() { |
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$config = gutenberg_experimental_global_styles_get_from_file( |
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dirname( dirname( __FILE__ ) ) . '/experimental-default-global-styles.json' |
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); |
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|
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return $config; |
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} |
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|
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/** |
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* Returns the theme presets registered via add_theme_support, if any. |
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* |
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* @return array Config that adheres to the theme.json schema. |
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*/ |
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function gutenberg_experimental_global_styles_get_theme_presets() { |
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$theme_presets = array(); |
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|
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$theme_colors = get_theme_support( 'editor-color-palette' )[0]; |
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if ( is_array( $theme_colors ) ) { |
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foreach ( $theme_colors as $color ) { |
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$theme_presets['global']['presets']['color'][] = array( |
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'slug' => $color['slug'], |
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'value' => $color['color'], |
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); |
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} |
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} |
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|
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$theme_gradients = get_theme_support( 'editor-gradient-presets' )[0]; |
| 199 |
if ( is_array( $theme_gradients ) ) { |
| 200 |
foreach ( $theme_gradients as $gradient ) { |
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$theme_presets['global']['presets']['gradient'][] = array( |
| 202 |
'slug' => $gradient['slug'], |
| 203 |
'value' => $gradient['gradient'], |
| 204 |
); |
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} |
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} |
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|
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$theme_font_sizes = get_theme_support( 'editor-font-sizes' )[0]; |
| 209 |
if ( is_array( $theme_font_sizes ) ) { |
| 210 |
foreach ( $theme_font_sizes as $font_size ) { |
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$theme_presets['global']['presets']['font-size'][] = array( |
| 212 |
'slug' => $font_size['slug'], |
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'value' => $font_size['size'], |
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); |
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} |
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} |
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|
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return $theme_presets; |
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} |
| 220 |
|
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/** |
| 222 |
* Returns the theme's origin config. |
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* |
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* It also fetches the existing presets the theme declared via add_theme_support |
| 225 |
* and uses them if the theme hasn't declared any via theme.json. |
| 226 |
* |
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* @return array Config that adheres to the theme.json schema. |
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*/ |
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function gutenberg_experimental_global_styles_get_theme() { |
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$theme_presets = gutenberg_experimental_global_styles_get_theme_presets(); |
| 231 |
$theme_config = gutenberg_experimental_global_styles_get_from_file( |
| 232 |
locate_template( 'experimental-theme.json' ) |
| 233 |
); |
| 234 |
|
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/* |
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* We want the presets declared in theme.json |
| 237 |
* to take precedence over the ones declared via add_theme_support. |
| 238 |
* |
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* Note that merging happens at the preset category level. Example: |
| 240 |
* |
| 241 |
* - if the theme declares a color palette via add_theme_support & |
| 242 |
* a set of font sizes via theme.json, both will be included in the output. |
| 243 |
* |
| 244 |
* - if the theme declares a color palette both via add_theme_support & |
| 245 |
* via theme.json, the later takes precedence. |
| 246 |
* |
| 247 |
*/ |
| 248 |
$theme_config = gutenberg_experimental_global_styles_merge_trees( |
| 249 |
$theme_presets, |
| 250 |
$theme_config |
| 251 |
); |
| 252 |
|
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return $theme_config; |
| 254 |
} |
| 255 |
|
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/** |
| 257 |
* Retrieves the block data (selector/supports). |
| 258 |
* |
| 259 |
* @return array |
| 260 |
*/ |
| 261 |
function gutenberg_experimental_global_styles_get_block_data() { |
| 262 |
// TODO: this data should be taken from the block registry. |
| 263 |
// |
| 264 |
// At the moment this array replicates the current capabilities |
| 265 |
// declared by blocks via __experimentalLineHeight, |
| 266 |
// __experimentalColor, and __experimentalFontSize. |
| 267 |
$block_data = array( |
| 268 |
'global' => array( |
| 269 |
'selector' => ':root', |
| 270 |
'supports' => array(), // By being blank, the 'global' section won't output any style yet. |
| 271 |
), |
| 272 |
'core/paragraph' => array( |
| 273 |
'selector' => 'p', |
| 274 |
'supports' => array( 'line-height', 'font-size', 'color' ), |
| 275 |
), |
| 276 |
'core/heading/h1' => array( |
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'selector' => 'h1', |
| 278 |
'supports' => array( 'line-height', 'font-size', 'color' ), |
| 279 |
), |
| 280 |
'core/heading/h2' => array( |
| 281 |
'selector' => 'h2', |
| 282 |
'supports' => array( 'line-height', 'font-size', 'color' ), |
| 283 |
), |
| 284 |
'core/heading/h3' => array( |
| 285 |
'selector' => 'h3', |
| 286 |
'supports' => array( 'line-height', 'font-size', 'color' ), |
| 287 |
), |
| 288 |
'core/heading/h4' => array( |
| 289 |
'selector' => 'h4', |
| 290 |
'supports' => array( 'line-height', 'font-size', 'color' ), |
| 291 |
), |
| 292 |
'core/heading/h5' => array( |
| 293 |
'selector' => 'h5', |
| 294 |
'supports' => array( 'line-height', 'font-size', 'color' ), |
| 295 |
), |
| 296 |
'core/heading/h6' => array( |
| 297 |
'selector' => 'h6', |
| 298 |
'supports' => array( 'line-height', 'font-size', 'color' ), |
| 299 |
), |
| 300 |
'core/columns' => array( |
| 301 |
'selector' => '.wp-block-columns', |
| 302 |
'supports' => array( 'color' ), |
| 303 |
), |
| 304 |
'core/group' => array( |
| 305 |
'selector' => '.wp-block-group', |
| 306 |
'supports' => array( 'color' ), |
| 307 |
), |
| 308 |
'core/media-text' => array( |
| 309 |
'selector' => '.wp-block-media-text', |
| 310 |
'supports' => array( 'color' ), |
| 311 |
), |
| 312 |
); |
| 313 |
|
| 314 |
return $block_data; |
| 315 |
} |
| 316 |
|
| 317 |
/** |
| 318 |
* Takes a tree adhering to the theme.json schema and generates |
| 319 |
* the corresponding stylesheet. |
| 320 |
* |
| 321 |
* @param array $tree Input tree. |
| 322 |
* |
| 323 |
* @return string Stylesheet. |
| 324 |
*/ |
| 325 |
function gutenberg_experimental_global_styles_resolver( $tree ) { |
| 326 |
$stylesheet = ''; |
| 327 |
$block_data = gutenberg_experimental_global_styles_get_block_data(); |
| 328 |
foreach ( array_keys( $tree ) as $block_name ) { |
| 329 |
if ( |
| 330 |
! array_key_exists( $block_name, $block_data ) || |
| 331 |
! array_key_exists( 'selector', $block_data[ $block_name ] ) || |
| 332 |
! array_key_exists( 'supports', $block_data[ $block_name ] ) |
| 333 |
) { |
| 334 |
// Skip blocks that haven't declared support, |
| 335 |
// because we don't know to process them. |
| 336 |
continue; |
| 337 |
} |
| 338 |
|
| 339 |
// Extract the relevant preset info before converting them to CSS Custom Properties. |
| 340 |
foreach ( array_keys( $tree[ $block_name ]['presets'] ) as $preset_category ) { |
| 341 |
$flattened_values = array(); |
| 342 |
foreach ( $tree[ $block_name ]['presets'][ $preset_category ] as $preset_value ) { |
| 343 |
$flattened_values[ $preset_value['slug'] ] = $preset_value['value']; |
| 344 |
} |
| 345 |
$tree[ $block_name ]['presets'][ $preset_category ] = $flattened_values; |
| 346 |
} |
| 347 |
|
| 348 |
$token = '--'; |
| 349 |
$prefix = '--wp--preset' . $token; |
| 350 |
$css_variables = gutenberg_experimental_global_styles_get_css_vars( $tree[ $block_name ]['presets'], $prefix, $token ); |
| 351 |
|
| 352 |
$stylesheet .= gutenberg_experimental_global_styles_resolver_styles( |
| 353 |
$block_data[ $block_name ]['selector'], |
| 354 |
$block_data[ $block_name ]['supports'], |
| 355 |
array_merge( $tree[ $block_name ]['styles'], $css_variables ) |
| 356 |
); |
| 357 |
} |
| 358 |
return $stylesheet; |
| 359 |
} |
| 360 |
|
| 361 |
/** |
| 362 |
* Generates CSS declarations for a block. |
| 363 |
* |
| 364 |
* @param string $block_selector CSS selector for the block. |
| 365 |
* @param array $block_supports A list of properties supported by the block. |
| 366 |
* @param array $block_styles The list of properties/values to be converted to CSS. |
| 367 |
* |
| 368 |
* @return string The corresponding CSS rule. |
| 369 |
*/ |
| 370 |
function gutenberg_experimental_global_styles_resolver_styles( $block_selector, $block_supports, $block_styles ) { |
| 371 |
$css_rule = ''; |
| 372 |
$css_declarations = ''; |
| 373 |
foreach ( $block_styles as $property => $value ) { |
| 374 |
// Only convert to CSS: |
| 375 |
// |
| 376 |
// 1) The style attributes the block has declared support for. |
| 377 |
// 2) Any CSS custom property attached to the node. |
| 378 |
if ( in_array( $property, $block_supports, true ) || strstr( $property, '--' ) ) { |
| 379 |
$css_declarations .= "\t" . $property . ': ' . $value . ";\n"; |
| 380 |
} |
| 381 |
} |
| 382 |
if ( '' !== $css_declarations ) { |
| 383 |
$css_rule .= $block_selector . " {\n"; |
| 384 |
$css_rule .= $css_declarations; |
| 385 |
$css_rule .= "}\n"; |
| 386 |
} |
| 387 |
|
| 388 |
return $css_rule; |
| 389 |
} |
| 390 |
|
| 391 |
/** |
| 392 |
* Helper function that merges trees that adhere to the theme.json schema. |
| 393 |
* |
| 394 |
* @param array $core Core origin. |
| 395 |
* @param array $theme Theme origin. |
| 396 |
* @param array $user User origin. An empty array by default. |
| 397 |
* |
| 398 |
* @return array The merged result. |
| 399 |
*/ |
| 400 |
function gutenberg_experimental_global_styles_merge_trees( $core, $theme, $user = array() ) { |
| 401 |
$core = gutenberg_experimental_global_styles_normalize_schema( $core ); |
| 402 |
$theme = gutenberg_experimental_global_styles_normalize_schema( $theme ); |
| 403 |
$user = gutenberg_experimental_global_styles_normalize_schema( $user ); |
| 404 |
$result = gutenberg_experimental_global_styles_normalize_schema( array() ); |
| 405 |
|
| 406 |
foreach ( array_keys( $core ) as $block_name ) { |
| 407 |
foreach ( array( 'presets', 'styles', 'features' ) as $subtree ) { |
| 408 |
$result[ $block_name ][ $subtree ] = array_merge( |
| 409 |
$core[ $block_name ][ $subtree ], |
| 410 |
$theme[ $block_name ][ $subtree ], |
| 411 |
$user[ $block_name ][ $subtree ] |
| 412 |
); |
| 413 |
} |
| 414 |
} |
| 415 |
|
| 416 |
return $result; |
| 417 |
} |
| 418 |
|
| 419 |
/** |
| 420 |
* Given a tree, it normalizes it to the expected schema. |
| 421 |
* |
| 422 |
* @param array $tree Source tree to normalize. |
| 423 |
* |
| 424 |
* @return array Normalized tree. |
| 425 |
*/ |
| 426 |
function gutenberg_experimental_global_styles_normalize_schema( $tree ) { |
| 427 |
$block_schema = array( |
| 428 |
'styles' => array(), |
| 429 |
'features' => array(), |
| 430 |
'presets' => array(), |
| 431 |
); |
| 432 |
|
| 433 |
$normalized_tree = array(); |
| 434 |
$block_data = gutenberg_experimental_global_styles_get_block_data(); |
| 435 |
foreach ( array_keys( $block_data ) as $block_name ) { |
| 436 |
$normalized_tree[ $block_name ] = $block_schema; |
| 437 |
} |
| 438 |
|
| 439 |
$tree = array_merge_recursive( |
| 440 |
$normalized_tree, |
| 441 |
$tree |
| 442 |
); |
| 443 |
|
| 444 |
return $tree; |
| 445 |
} |
| 446 |
|
| 447 |
/** |
| 448 |
* Returns the stylesheet resulting of merging |
| 449 |
* core's, theme's, and user's origins. |
| 450 |
* |
| 451 |
* @return string |
| 452 |
*/ |
| 453 |
function gutenberg_experimental_global_styles_get_stylesheet() { |
| 454 |
$gs_merged = array(); |
| 455 |
$gs_core = gutenberg_experimental_global_styles_get_core(); |
| 456 |
$gs_theme = gutenberg_experimental_global_styles_get_theme(); |
| 457 |
$gs_user = gutenberg_experimental_global_styles_get_user(); |
| 458 |
|
| 459 |
$gs_merged = gutenberg_experimental_global_styles_merge_trees( $gs_core, $gs_theme, $gs_user ); |
| 460 |
|
| 461 |
$stylesheet = gutenberg_experimental_global_styles_resolver( $gs_merged ); |
| 462 |
if ( empty( $stylesheet ) ) { |
| 463 |
return; |
| 464 |
} |
| 465 |
return $stylesheet; |
| 466 |
} |
| 467 |
|
| 468 |
/** |
| 469 |
* Fetches the preferences for each origin (core, theme, user) |
| 470 |
* and enqueues the resulting stylesheet. |
| 471 |
*/ |
| 472 |
function gutenberg_experimental_global_styles_enqueue_assets() { |
| 473 |
if ( ! gutenberg_experimental_global_styles_has_theme_json_support() ) { |
| 474 |
return; |
| 475 |
} |
| 476 |
|
| 477 |
$stylesheet = gutenberg_experimental_global_styles_get_stylesheet(); |
| 478 |
|
| 479 |
wp_register_style( 'global-styles', false, array(), true, true ); |
| 480 |
wp_add_inline_style( 'global-styles', $stylesheet ); |
| 481 |
wp_enqueue_style( 'global-styles' ); |
| 482 |
} |
| 483 |
|
| 484 |
/** |
| 485 |
* Adds the necessary data for the Global Styles client UI to the block settings. |
| 486 |
* |
| 487 |
* @param array $settings Existing block editor settings. |
| 488 |
* @return array New block editor settings |
| 489 |
*/ |
| 490 |
function gutenberg_experimental_global_styles_settings( $settings ) { |
| 491 |
if ( ! gutenberg_experimental_global_styles_has_theme_json_support() ) { |
| 492 |
return $settings; |
| 493 |
} |
| 494 |
|
| 495 |
$settings['__experimentalGlobalStylesUserEntityId'] = gutenberg_experimental_global_styles_get_user_cpt_id(); |
| 496 |
|
| 497 |
$global_styles = gutenberg_experimental_global_styles_merge_trees( |
| 498 |
gutenberg_experimental_global_styles_get_core(), |
| 499 |
gutenberg_experimental_global_styles_get_theme() |
| 500 |
); |
| 501 |
|
| 502 |
$settings['__experimentalGlobalStylesBase'] = $global_styles; |
| 503 |
|
| 504 |
// Add the styles for the editor via the settings |
| 505 |
// so they get processed as if they were added via add_editor_styles: |
| 506 |
// they will get the editor wrapper class. |
| 507 |
$settings['styles'][] = array( 'css' => gutenberg_experimental_global_styles_get_stylesheet() ); |
| 508 |
|
| 509 |
return $settings; |
| 510 |
} |
| 511 |
|
| 512 |
/** |
| 513 |
* Registers a Custom Post Type to store the user's origin config. |
| 514 |
*/ |
| 515 |
function gutenberg_experimental_global_styles_register_cpt() { |
| 516 |
if ( ! gutenberg_experimental_global_styles_has_theme_json_support() ) { |
| 517 |
return; |
| 518 |
} |
| 519 |
|
| 520 |
$args = array( |
| 521 |
'label' => __( 'Global Styles', 'gutenberg' ), |
| 522 |
'description' => 'CPT to store user design tokens', |
| 523 |
'public' => false, |
| 524 |
'show_ui' => false, |
| 525 |
'show_in_rest' => true, |
| 526 |
'rest_base' => '__experimental/global-styles', |
| 527 |
'capabilities' => array( |
| 528 |
'read' => 'edit_theme_options', |
| 529 |
'create_posts' => 'edit_theme_options', |
| 530 |
'edit_posts' => 'edit_theme_options', |
| 531 |
'edit_published_posts' => 'edit_theme_options', |
| 532 |
'delete_published_posts' => 'edit_theme_options', |
| 533 |
'edit_others_posts' => 'edit_theme_options', |
| 534 |
'delete_others_posts' => 'edit_theme_options', |
| 535 |
), |
| 536 |
'map_meta_cap' => true, |
| 537 |
'supports' => array( |
| 538 |
'editor', |
| 539 |
'revisions', |
| 540 |
), |
| 541 |
); |
| 542 |
register_post_type( 'wp_global_styles', $args ); |
| 543 |
} |
| 544 |
|
| 545 |
add_action( 'init', 'gutenberg_experimental_global_styles_register_cpt' ); |
| 546 |
add_filter( 'block_editor_settings', 'gutenberg_experimental_global_styles_settings' ); |
| 547 |
add_action( 'wp_enqueue_scripts', 'gutenberg_experimental_global_styles_enqueue_assets' ); |
| 548 |
|
